MACROMEDIA DREAMWEAVER MX 2004-EXTENDING DREAMWEAVER Spécifications télécharger pdf (Page 459)

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C-level extensibility and the JavaScript interpreter 459

The following example shows how the MM_Init() function for the library myLibrary

might look:

void

MM_Init()

{

JS_DefineFunction("readContentsOfFile", readContentsOfFile, 1);

}

Your library must include exactly one instance of the following macro:

/* MM_STATE is a macro that expands to some definitions that are

* needed to interact with Dreamweaver. This macro must

* be defined exactly once in your library. */

MM_STATE

C-level extensibility and the JavaScript

interpreter

The C code in your library must interact with the Dreamweaver JavaScript interpreter at the

following different times:

■ At startup, to register the library’s functions

■ When the function is called, to parse the arguments that JavaScript is passing to C

■ Before the function returns, to package the return value

To accomplish these tasks, the interpreter defines several data types and exposes an API.

Definitions for the data types and functions that are listed in this section appear in the

mm_jsapi.h file. For your library to work properly, you must include the mm_jsapi.h file with

the following line at the top of each file in your library:

#include "mm_jsapi.h"

Including the mm_jsapi.h file includes, in turn, mm_jsapi_environment.h, which defines the

MM_Environment structure.

NOTE

The library can be implemented in either C or C++, but the file that contains the MM_Init()

function and the

MM_STATE macro must be implemented in C. The C++ compiler garbles

function names, which makes it impossible for Dreamweaver to find the

MM_Init()

function.

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MACROMEDIA DREAMWEAVER MX 2004-EXTENDING DREAMWEAVER Spécifications Page 459

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